Donald Trump takes the oath of office on Jan. 20. An estimated 800,000 people will show up to watch.
About 250,000 people with tickets will crowd into the space closest to the podium. Everyone else will pack into the National Mall to watch on TV screens.
More than three dozen agencies are handling security. Additionally, thousands of soldiers and police officers will be there.
At least 26 groups are asking to protest in Washington, D.C. Officials think nearly 400,000 demonstrators will show up over inauguration weekend.
The whole thing is projected to cost $175 million to $200 million. Private donors are expected to cover at least $90 million; taxpayers will foot the rest of the bill.
